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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>It could be $EnvVar1 and 2 are in fact not
initialized and that is the complaint.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Is this what you’re trying to say?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>my $EnvVar1 = ($EnvVar1 ||
"DefaultValue1");<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>my $EnvVar2 = ($EnvVar2 ||
"DefaultValue2");<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>my $Var3 = "$EnvVar1 --
$EnvVar2";<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>English:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>If for some reason $EnvVar1 doesn’t
have a value, use the value “DefaultValue1”<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
omaha-pm-bounces@pm.org [mailto:omaha-pm-bounces@pm.org] <b><span
style='font-weight:bold'>On Behalf Of </span></b>Daniel Linder<br>
<b><span style='font-weight:bold'>Sent:</span></b> Thursday, September 01, 2005
10:36 AM<br>
<b><span style='font-weight:bold'>To:</span></b> omaha-pm@pm.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> [Omaha.pm] Proper way to
test a variable with strict and -w?</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Guys,<br>
<br>
I have this basic perl script:<o:p></o:p></span></font></p>
<div style='margin-left:33.5pt'>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>#!perl -w<br>
use strict;<br>
<br>
use Env qw(EnvVar1 EnvVar2);<br>
<br>
my $EnvVar1="DefaultValue1" if ("" eq
"$EnvVar1");<br>
my $EnvVar2="DefaultValue2" if ("" eq
"$EnvVar2");<br>
my $Var3 = "$EnvVar1 -- $EnvVar2";<o:p></o:p></span></font></p>
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<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'><br>
When I run it, the perl interperter complains about "Use of uninitialized
value in concatenation" on the "Var3" line (the last line.<br>
<br>
Did I mess things up by putting the "my" on the "EnvVar1"
and "EnvVar2" lines -- these variables should be defined on the
"use Env" line, right?<br>
<br>
If you were to re-write this whole section, how would you do it? This is
my thought:<o:p></o:p></span></font></p>
<div style='margin-left:33.5pt'>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>#!perl -w<br>
use strict;<br>
<br>
use Env qw(EnvVar1 EnvVar2);<br>
<br>
my $EnvVar1 = "DefaultValue1" if (! exists ($EnvVar1));<br>
my $EnvVar2 = "DefaultValue2" if (! exists ($EnvVar2));<br>
my $Var3 = "$EnvVar1 -- $EnvVar2";<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><br>
Dan<br>
<br>
- - - - -<br>
"Wait for that wisest of all counselors, time." -- Pericles<br>
"I do not fear computer, I fear the lack of them." -- Isaac Asimov<br>
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